dvd lab pro audio error

[tomoftenville]

hi all

i am having difficulty with additional audio selections in dvd lab

at first i authour the standard video track and it plays fine.

once i had the additional audio, it plays fine for 20 seconds then playback becomes all juddery.if i skip a chapter the dvd either stalls or plays with no audio. i leave the main track as .mpa and the additional audio tracks are 48k pcm. i use vegas to render as wav. i have also used dvd lab audio transcoder but the same thing happens.

i have done multiple audio tracks on dvds before with no problems.

thanks

[Baldrick]

Have you tried play the dvd on another dvd player or on your computer with a software dvd player? Same problem then also?

[guns1inger]

PCM requires a bitrate of 1536 kbps. I suspect that when you combine this with your video bitrate, you blow either the 10080 limit for DVD, or simply the capability of your player as far as bitrate is concerned. Some players simply cannot read the full allowable bitrate from burned media.

You don't have this problem with the mpeg audio because it uses a much lower bitrate - probably 192 - 224 kbps.

What is the bitrate of your video ?

[tomoftenville]

PCM requires a bitrate of 1536 kbps. I suspect that when you combine this with your video bitrate, you blow either the 10080 limit for DVD, or simply the capability of your player as far as bitrate is concerned. Some players simply cannot read the full allowable bitrate from burned media.

You don't have this problem with the mpeg audio because it uses a much lower bitrate - probably 192 - 224 kbps.

What is the bitrate of your video ?

at the moment i am playing from pc hdd, i have burned 4/5 copies with various audio configs and the same errors on standalon/pc/and xbox 360

[tomoftenville]

PCM requires a bitrate of 1536 kbps. I suspect that when you combine this with your video bitrate, you blow either the 10080 limit for DVD, or simply the capability of your player as far as bitrate is concerned. Some players simply cannot read the full allowable bitrate from burned media.

You don't have this problem with the mpeg audio because it uses a much lower bitrate - probably 192 - 224 kbps.

What is the bitrate of your video ?

the video bitrate is 5962kbps the 4 audios are 1536kbps so the 4 and the video could be too much. would it be a case of making the audio mpeg?

[GeorgeW]

the video bitrate is 5962kbps the 4 audios are 1536kbps so the 4 and the video could be too much. would it be a case of making the audio mpeg?

If the additional audio tracks are "alternate" audio for the same video Title, then you would be going past the max bitrate (as guns1inger suggested). In some versions of Vegas, you can render out Dolby Digital (AC3) audio tracks -- that would be good to use (or stick with mpeg audio if compliant for your dvd...)

For bitrates, you need to add all the alternate audio tracks and the video combined to see if you are going against the allowable max bitrate (unlike alternate video angles).

Regards,
George

[tomoftenville]

thank you very much, its worked.this is the first time i have done 4 audio sources, i have done 2 audio sources with no trouble. i was thinking on the lines of video-5000-audio 1500 which would be o.k as ther dvd will only play the selected audio. i did`nt think video + the 4 single sources would cause that much trouble. so now i have 1 mpa and 3 mp2 audios and it works as intenses.

thank you all very much.

[guns1inger]

Unless you need the highest fidelity stereo audio, PCM is just a waste of space. 256 kbps AC3 will do in most cases, and depending on the source 224 or even 192 kbps may be acceptable.